Ovary Development and Maturation in Nezara viridula (L.) (Hemiptera: Pentatomidae)

Abstract

Ovary development and maturation of Nezara viridula (L.) were evaluated by examining ovariole morphology and the alterations in the biochemical (protein synthesis related to reproduction) composition of the hemolymph. Quantitative and qualitative protein analyses were performed and ovary structural alterations for the pre-reproductive and reproductive stages were recorded. Total concentration of proteins in female hemolymph gradually increased until the end of the pre-mating stage, remaining unaltered thereafter. Proteins linked to reproduction (vitellogenins) appeared in the hemolymph 10 days after adult emergence and indicated the end of the pre-mating stage. After mating, total protein concentration in the hemolymph was lower compared to virgin females; vitellogenin levels were similar during most of the observation period. Oocyte development and maturation were gradual and age dependent. Ten-day-old females had chorionated oocytes ready for fertilization. Mating did not stimulate oocyte development in N. viridula, but the lack of mating activity appeared to have stimulated oocyte resorption in 17-day-old females.

Performance of reproductive system of Dichelops melacanthus (Hemiptera: Pentatomidae) subjected to buprofezin and pyriproxyfen: morphological analysis of ovarioles and testes

“…The ovaries of D. melacanthus are telotrophic and meroistic, containing a trophic region (tropharium) with a germarium and nurse cells, vitellarium cells with oocytes ( Figure 1A-1C), apical filaments and a pedicel; these anatomical features are found in insects of the same family, as described by other authors (CHAPMAN, 1998;KUGLER et al, 2006;OGORZAŁEK;TROCHIMCZUK, 2009;FORTES et al, 2011;GOMES et al, 2013). In the tropharium, in the ovariole distal region, oocytes and nurse cells are formed, which were also observed in D. melacanthus ( Figure 1A-1C).…”

Use of chromatin remodeling ATPases as RNAi targets for parental control of western corn rootworm (Diabrotica virgifera virgifera) and Neotropical brown stink bug (Euschistus heros)

“…pRNAi response, since both Coleoptera and Hemiptera have telotrophic meroistic ovarioles (Klowden, 2008). Newly molted stinkbug females have undeveloped ovaries, and the ovary development seems to proceed at the same rate regardless of whether the female has mated or not (Fortes et al, 2011). The pre-mating and pre-oviposition periods seem to vary based on the species, with the pre-mating period lasting up to ten days with pre-oviposition periods of up to two weeks (Fortes et al, 2011;Silva et al, 2011).…”

“…Newly molted stinkbug females have undeveloped ovaries, and the ovary development seems to proceed at the same rate regardless of whether the female has mated or not (Fortes et al, 2011). The pre-mating and pre-oviposition periods seem to vary based on the species, with the pre-mating period lasting up to ten days with pre-oviposition periods of up to two weeks (Fortes et al, 2011;Silva et al, 2011). Similarly in WCR, the pre-oviposition period lasts between 12 and 15 days (Branson and Johnson, 1973;Hill, 1975).…”

Ovarian development in Cosmopolites sordidus Germar (Coleoptera: Curculionidae)

“…[16] revealed that maturation of ovaries in female insects are normally correlated with age until sexual maturity is reached. Correlations of ovarian development with female age are well established in insects [17]. [18] worked on the ladybird beetle Propylea dissecta (Coleoptera : Coccinellidae) and stated that mating accelerated ovarian development, and that increase in age led to increase in number of follicles, ovarian width, number of mature eggs and egg loads.…”